How to adding a repeater field in a repeater field

Hello,

have set up a repeater custom field, inside this I would like to add another repeater field.

The current code I am using is

<?php

			$rows = get_field('membership_option');
			if($rows)
			{
			foreach($rows as $row)
			 { ?>
			 <div class="item">

			<div class="itemLeft">
			 <h2><?php echo $row['membershipName']; ?></h2>
			 <p><?php echo $row['description']; ?></p>
			</div><!-- itemLeft-->

			<div class="itemCenter">
/* 2nd REPEATER FIELD HERE ------------------------- */

			<?php if(get_field('benefitsList')): ?>
			<ul>
			  <?php while(has_sub_field('benefits')): ?>
			   <li>sub_field_1 = <?php the_field('benefits'); ?></li>
			  <?php endwhile; ?>
			</ul>
			<?php endif; ?>

/* END 2ND REPEATER FIELD ------------------------------------ */

			</div><!-- itemCenter -->

			 <div class="itemRight">
			  <table class="prices">
			   <tr>
				<td></td>
				<td>Direct Debit*</td>
				<td>Monthly</td>
				<td>Annual</td>
			   </tr>
			   <tr>
				<td>Adult</td>
				<td><?php echo $row['adultDDprice']; ?></td>
				<td><?php echo $row['adultMonthlyPrice']; ?></td>
				<td><?php echo $row['adultAnnualPrice']; ?></td>
			   </tr>
			   <tr>
				<td>Senior (60+) /<br/> Student</td>
				<td><?php echo $row['senStuDDprice']; ?></td>
				<td><?php echo $row['senStuMonthlyPrice']; ?></td>
				<td><?php echo $row['senStuAnnualPrice']; ?></td>
			   </tr>

			  </table>

			 </div><!-- itemRight-->

			 </div><!--item-->
			<?php
			 } //end for
			}// endif ?>

I am wanting to add the 2nd repeater field just after the itemCenter div.

Any help much appreciated.

Thanks

http://wordpress.org/extend/plugins/advanced-custom-fields/